/Engine/Plugins/Online/OnlineSubsystem/Source/Public/OnlineNotification.h
Constructor from type andFJsonValueSystem message unless ToUserId is specified; FromUserId optional
FOnlineNotification ( const [FString](API\Runtime\Core\Containers\FString) & InTypeStr, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FJsonValue](API\Runtime\Json\Dom\FJsonValue) > & InPayload, FUniqueNetIdPtr InToUserId, FUniqueNetIdPtr InFromUserId, const [FString](API\Runtime\Core\Containers\FString) & InClientRequestIdStr )